DE698477C - Device to achieve the same hardness and smoothness at all points during the electrolytic copper plating of printing cylinders and rollers - Google Patents

Description

. Device for achieving a hardness that is the same at all points and = smoothness during electrolytic copper plating of printing cylinders and rollers. The object of the invention bildid, e device has the task of at all points' of the electrolytically deposited casing surface of DTÜckzylindern and D squeezing rollers to achieve the same density or hardness and the same smoothness Degree of hardness and smoothness according to the need. to be able to regulate.

For the purpose of achieving: a -dense and smooth surface in the electrolytic copper plating; g of gravure rollers and cylinders' various processes and devices have already been used, of which -those with -the surface hüf and fro sliding Glättsteinen or- smoothing rollers best proven It. has been found, however, in all these cases is that while at the same. simultaneous use of multiple Glättsteinen that all 'of performing the back and forth going movement of the surface to be treated, the seal and Smoothing to the. Urnk is more intrusive - it goes on, therefore steller. Unequal density or hardness and unequal smoothness arise. This is caused because the to and fro movement of the tools causes turning points. during the reversal of the tools (smoothing stones), the workpiece (printing cylinder or printing roller) remains in rotation; this disadvantage is exacerbated by däß for the purpose of: -Avoiding completely sealed and unsmoothed areas a. certain coverage of the paths. of: - Smoothing stones. successful, 'if-meh --_ regular smoothing stones are used, - what --- but, again --- double -, hardened areas on the printing roller (the printing cylinder) result.

As a result, one has moved on to it, instead. several only one To use smoothing stone so that the more dense, So harder -: places - outside the ball width of the too printing Paper, namely at the extreme end points of the printing roller (the printing cylinder) lie and practically do not have any more effect. But this again has the disadvantage that the even sealing and smoothing on a certain part of the bale width of the paper and therefore also takes longer over the entire width of the bale, as more Time passes before the Glättstein reaches the same place again on its return path. When using a single smoothing stone, this method could therefore be used the selected degree of hardness of the electrolytically deposited copper only because of this be regulated in an imperfect way that, the smoothing stone more or less often was passed over the to; smoothing and compacting surface, whereby but the duration of the work process was inadmissibly extended.

All these disadvantages are eliminated in that: according to the invention the carrier for the smoothing tools in the form of: a tensile stress-transmitting, over Guide roles guided endless link, z. B. a band,. Is trained, with guide rails for the tools are provided to the latter to the desired Make their way lift off the workpiece and place it on the same smoothly to be able to: An embodiment of the device used to carry out the 'method is shown in the drawing, for example.

Fig. I shows the device according to the invention in front view; Fig. Z is a section along line II-II of Fig. I.

In the figures, is a z i on the two bearings 3 mounted printing cylinder or a printing cylinder: With two laser 4 are earlier es g for the shaft 9, respectively. The shaft 9 carries the pulley 6 with drive belts and the support roller 15 for the carrier 7 of the tools 8._.

According to the invention, the carrier for the tools is in the form .eines Tension member formed; which. in the present embodiment by an endless Band is formed - The carrier for the tools was also known in a chain, consist of a rope or a similar pulling element. i.6. is the: second roller. The guide means 21; 22 are .in the present embodiment according to the invention arranged for the purpose; to gently lift the tools at the ends of the pressure rollers respectively. to be able to put them on without bumps. 5, three are movable in a known manner stored anodes; i o is the container for the bath liquid. ,Of course the movably mounted anodes can also be replaced by fixed anodes.

The function of the device is as follows Drive are by means of the belt i i and the pulley 6 and the support rollers 15, 16, the carrier 7 and the tools 8 sitting on it, for. B. in the direction. the arrows p1 according to Fig. i moves. At the same time z. B. the platen i in the direction of the arrow p2 shown in Fig. 2. As a result of this in all places the same feed of the tools 8 takes place .ein line coverage the rotating roller through the smoothing stones similar to turning a workpiece on the lathe. The smoothing stones are always on the same side, on the Workpiece on and coat the same evenly. If they are at any interval are attached to each other, any number of such smoothing stones can be used without a reversal point with its disadvantageous consequences of uneven hardening b2w. The workpiece is smoothed.

It is clear that, for example, without further ado; at the same time four to five smoothing stones can run on the roller, thus a much harder copper is generated as if four to five times as much time passed, except for the same Deposited amount of copper again: a seal or smoothing takes place.

Claims (1)

PATENT CLAIM. Device to achieve the same in all places Hardness and smoothness during electrolytic copper plating of printing cylinders and Pressure rollers by means of smoothing tools moved over their surface, in particular for Gravure printing, characterized in that the carrier (7) for the smoothing tools (8) in the form of a tensile stress-transmitting, guided via guide rollers (15, 16) endless link, e.g. B. a band is formed; wherein guide rails (21; 22) for -the tools (8) are provided to put the latter in the desired places lift their way from the workpiece (i) and touch down on the same smoothly can..